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Nitrogen-Doped 3D-Graphene Advances Near-Infrared Photodetector for Logic Circuits and Image Sensors Overcoming 2D Limitations.

Nitrogen-Doped 3D-Graphene Advances Near-Infrared Photodetector for Logic Circuits and Image Sensors Overcoming 2D Limitations.

Authors :
Zhang G
Wang B
Wu H
Zhang J
Lian S
Bai W
Zhang S
Liu Z
Yang S
Ding G
Ye C
Zheng L
Wang G
Source :
Nano letters [Nano Lett] 2024 Aug 21; Vol. 24 (33), pp. 10062-10071. Date of Electronic Publication: 2024 Jul 22.
Publication Year :
2024

Abstract

The limitations of two-dimensional (2D) graphene in broadband photodetector are overcome by integrating nitrogen (N) doping into three-dimensional (3D) structures within silicon (Si) via plasma-assisted chemical vapor deposition (PACVD) technology. This contributes to the construction of vertical Schottky heterojunction broad-spectrum photodetectors and applications in logic devices and image sensors. The natural nanoscale resonant cavity structure of 3D-graphene enhances photon capture efficiency, thereby increasing photocarrier generation. N-doping can fine-tune the electronic structure, advancing the Schottky barrier height and reducing dark current. The as-fabricated photodetector exhibits exceptional self-driven photoresponse, especially at 1550 nm, with an excellent photoresponsivity (79.6 A/W), specific detectivity (10 <superscript>13</superscript> Jones), and rapid response of 130 μs. Moreover, it enables logic circuits, high-resolution pattern image recognition, and broadband spectra recording across the visible to near-infrared range (400-1550 nm). This research will provide new views and technical support for the development and widespread application of high-performance semiconductor-based graphene broadband detectors.

Details

Language :
English
ISSN :
1530-6992
Volume :
24
Issue :
33
Database :
MEDLINE
Journal :
Nano letters
Publication Type :
Academic Journal
Accession number :
39038033
Full Text :
https://doi.org/10.1021/acs.nanolett.4c01917